/Engine/Plugins/Runtime/MeshModelingToolset/Source/ModelingComponents/Public/Selection/GeometrySelectionManager.h
Get avaialble information about the active selection/state
virtual void GetActiveSelectionInfo ( [EGeometryTopologyType](API\Plugins\DynamicMesh\Selections\UE__Geometry__EGeometryTopologyT-) & TopologyTypeOut, [EGeometryElementType](API\Plugins\DynamicMesh\Selections\UE__Geometry__EGeometryElementTy-) & ElementTypeOut, int & NumTargetsOut, bool & bIsEmpty ) const